Abstract
We show that Weinberg’s leading soft photon theorem in massless abelian gauge theories implies the existence of an infinite-dimensional large gauge symmetry which acts non-trivially on the null boundaries ± of (d + 2)-dimensional Minkowski spacetime. These symmetries are parameterized by an arbitrary function ε(x) of the d-dimensional celestial sphere living at ±. This extends the previously established equivalence between Weinberg’s leading soft theorem and asymptotic symmetries from four and higher even dimensions to all higher dimensions.
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He, T., Mitra, P. Asymptotic symmetries and Weinberg’s soft photon theorem in Minkd+2. J. High Energ. Phys. 2019, 213 (2019). https://doi.org/10.1007/JHEP10(2019)213
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DOI: https://doi.org/10.1007/JHEP10(2019)213